Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2013

Marketable Securities [Abstract]

Schedule Of Available-For-Sale Marketable Securities

As of December 31, 2013, the Company's available-for-sale Marketable securities had gross unrealized gains and (losses) of $2.3 million and $1.5 million, respectively, and consisted of the following:

			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated Fair
	Cost		Gains		Losses		Value
Auction rate securities - municipal debt	$	3.8	$	-	$	(0.4	)$	3.4
Corporate debt securities		360.7		1.6		(0.2	)	362.1
Government and agency debt securities		358.2		0.2		(0.1	)	358.3
Asset-backed and mortgage-backed securities		73.2		0.5		(0.1	)	73.6
Total debt securities		795.9		2.3		(0.8	)	797.4
Auction rate securities - preferred		4.0		-		(0.7	)	3.3
Total security investments		799.9		2.3		(1.5	)	800.7
Cash equivalents		(12.5	)	-		-		(12.5	)
Total marketable securities	$	787.4	$	2.3	$	(1.5	)$	788.2

As of December 31, 2012, the Company's available-for-sale Marketable securities had gross unrealized gains and (losses) of $3.6 million and $1.6 million, respectively, and consisted of the following:

			Gross		Gross
	Amortized		Unrealized		Unrealized		Estimated Fair
	Cost		Gains		Losses		Value
Auction rate securities - municipal debt	$	3.8	$	-	$	(0.5	)$	3.3
Corporate debt securities		301.3		2.4		(0.1	)	303.6
Government and agency debt securities		340.2		0.6		-		340.8
Asset-backed and mortgage-backed securities		55.9		0.6		-		56.5
Total debt securities		701.2		3.6		(0.6	)	704.2
Auction rate securities - preferred		4.0		-		(1.0	)	3.0
Total security investments		705.2		3.6		(1.6	)	707.2
Cash equivalents		(7.5	)	-		-		(7.5	)
Total marketable securities	$	697.7	$	3.6	$	(1.6	)$	699.7

Schedule Of Contractual Maturities Of Available-For-Sale Marketable Securities

	2013				2012
	Amortized		Estimated Fair		Amortized		Estimated Fair
	Cost		Value		Cost		Value
Due in less than one year	$	160.4	$	160.6	$	185.4	$	185.8
Due in one to five years		621.1		622.2		498.3		500.9
Due after five years		18.4		17.9		21.5		20.5
Total available-for-sale marketable securities	$	799.9	$	800.7	$	705.2	$	707.2

Schedule Of Amount Related To Credit Losses Recognized In Earnings For Other-Than-Temporary Impairments

Beginning balance of amounts related to credit losses, January 1, 2011	$	2.7
Credit losses on debt securities for which OTTI was not previously recognized		-
Additional credit losses on debt securities for which OTTI was previously recognized		-
Reductions for securities sold in the period for which OTTI was previously recognized		(0.5	)
Ending balance of amounts related to credit losses, December 31, 2011	$	2.2
Credit losses on debt securities for which OTTI was not previously recognized		-
Additional credit losses on debt securities for which OTTI was previously recognized		-
Reductions for securities sold in the period for which OTTI was previously recognized		(1.9	)
Ending balance of amounts related to credit losses, December 31, 2012	$	0.3
Credit losses on debt securities for which OTTI was not previously recognized		-
Additional credit losses on debt securities for which OTTI was previously recognized		-
Reductions for securities sold in the period for which OTTI was previously recognized		(0.1	)
Ending balance of amounts related to credit losses, December 31, 2013	$	0.2

Schedule Of Marketable Securities With Gross Unrealized Losses For Which No Other-Than-Temporary Impairment Has Been Incurred

The following table provides information at December 31, 2013, about the Company's marketable securities with gross unrealized losses for which no other-than-temporary impairment has been incurred, and the length of time that individual securities have been in a continuous unrealized loss position. The gross unrealized loss of $1.5 million, pre-tax, is recognized in accumulated other comprehensive income:

	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Auction rate securities	$	-	$	-	$	6.7	$	(1.1	)$	6.7	$	(1.1	)
Corporate debt securities		85.7		(0.2	)	1.2		-		86.9		(0.2	)
Asset-backed and mortgage-backed securities		43.4		(0.1	)	0.1		-		43.5		(0.1	)
Government and agency		158.5		(0.1	)	-		-		158.5		(0.1	)
Total	$	287.6	$	(0.4	)$	8.0	$	(1.1	)$	295.6	$	(1.5	)

The following table provides information, at December 31, 2012, about the Company's marketable securities with gross unrealized losses for which no other-than-temporary impairment has been incurred, and the length of time that individual securities have been in a continuous unrealized loss position. The gross unrealized loss of $1.6 million, pre-tax, is recognized in accumulated other comprehensive income:

	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Auction rate securities	$	-	$	-	$	6.3	$	(1.5	)$	6.3	$	(1.5	)
Corporate debt securities		54.9		(0.1	)	1.4		-		56.3		(0.1	)
Asset-backed and mortgage-backed securities		6.7		-		0.2		-		6.9		-
Government and agency		30.9		-		-		-		30.9		-
Total	$	92.5	$	(0.1	)$	7.9	$	(1.5	)$	100.4	$	(1.6	)

Schedule Of Marketable Securities With Gross Unrealized Losses For Which Other-Than-Temporary Impairment Has Been Incurred

The following table provides information, at December 31, 2012, about the Company's marketable securities with gross unrealized losses for which other-than-temporary impairment has been incurred, and the length of time that individual securities have been in a continuous unrealized loss position:

	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss		Value		Loss
Asset-backed and mortgage-backed securities	$	0.1	$	-	$	-	$	-	$	0.1	$	-
Total	$	0.1	$	-	$	-	$	-	$	0.1	$	-